Astronomy and Astrophysics – Astronomy
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.2401a&link_type=abstract
American Astronomical Society Meeting 204, #24.01; Bulletin of the American Astronomical Society, Vol. 36, p.690
Astronomy and Astrophysics
Astronomy
Scientific paper
At any one time, about one quarter of the rapidly rotating early-type stars show sharp absorption lines due to hot inner disks (temperatures 10,000 K). The lines appear and disappear on time scales of decades, indicating that they are ephemeral, not primordial. Because no such lines occur around stars with projected rotational velocities less than about 200 km/s, the lines are formed in disks, not spherical shells. We looked in the cores of H alpha for disk lines in 181 rapidly rotating B9-A5 V or IV stars and all 97 northern shell stars listed in the Bright Star Catalogue. It was found that the 145 stars without disk lines are well distributed in galactic coordinates, but the 87 stars with disk lines avoid the core of the local interstellar bubble. A working model is that in dense regions these stars may accrete disks, but where the interstellar density is less than 10% than that outside the bubble, the stars loose them due to strong winds.
No associations
LandOfFree
Evidence for an Interstellar Origin for Hot Inner Disks around Rapidly Rotating Early-type Stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Evidence for an Interstellar Origin for Hot Inner Disks around Rapidly Rotating Early-type Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for an Interstellar Origin for Hot Inner Disks around Rapidly Rotating Early-type Stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1170958